planoblast definition

  • noun:
    • The medusa of particular hydrozoans.
    • Any free-swimming gonophore of a hydroid; a hydroid medusa.
    • Any free-swimming gonophore of a hydroid; a hydroid medusa.
    • A wandering bud; the free medusoid of gymnoblastic hydrozoans; the gonophore of such hydroids, detached through the colony, leading a completely independent locomotory life, and discharging its mature intimate products into the water: distinguished through the hedrioblast, or inactive bud.
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